If you use a company like USrentacar.co.uk their cars come with All inclusive insurance. They only other option with them is upgrade to Gold, this gives exactly the same insurance but additional drivers and a tank of gas included.
Sometimes additional driver is included with the All Inclusive option so only benefit from gold would be the tank of gas.
For 16 years I took the Gold option but with increased prices its rarely worth it anymore unless you go for a short holiday, longer the trip less worthwhile it is buying.
When you arrive in Orlando the rental company could try get you to take addition insurances like Roadside assist, you are covered for regular breakdowns with all rental companies but they try sell this cover for accidental/self inflicted problems like locking keys in, leaving lights on all night etc, its something I have never bought it costs around $5/day.
They could also try get you to take Satnav, Take your own with US maps or buy in Walmart, they cost to buy about same price as 2 weeks rental.
Last one is Tolls, they try rent you like a toll fastpass, drive straight thru tha tolls and it charges your credit card rather than stopping to pay, these are about $10/week + toll fees (slight reduction on cash fees) again not something I have ever done.
When you are ready to rent post you dates, best price you can find, size of car you want & how many drivers and myself or others will tell you if it can be rented cheaper elsewhere.
